Concerning Mitsar products, the job of interfacing Matlab with Mitsar amps should be done by the MITSAR.API (http://www.mitsar-medical.com/eeg-software/eeg-api-matlab/). But if I understand correctly, there is another device which should receive triggers from MATLAB. I would expect that the API provided by Mitsar is not so easily to be modified for your purpose. But this is a question to the Mitsar support that costs you a phone call. If you have to program your own interface for Matlab, then only the .NET framework which is working now with MATLAB, might be an appropriate programming platform. .NET provides the real-time capabilities necessary for delivering miliseconds precision triggers in psychophysiological experiments. Concerning real-time applications, Windows is a heck anyway. So, whatever solution you would implement for this setup, it is recommended to measure trigger timing with an oscilloscope, thus specifying failures of the trigger signal as there are delays, jitter or any other. Best of luck!

Thanks a lot Dr. Dieter

speaking of triggers this devices solved our problems with eeg tms systems http://www.braintrends.it/devices.html